Device for use in sharpening screw drivers and the like



April 11, 1944. E. L. GUY 2,346,300

DEVICE FOR USE IN SHARPENING SCREW DRIVERS AND THE LIKE Filed May 5, 1943 JNVENTOR.

file v5.57- A Ga A ITIRNE) Patented Apr. 11, 1944 oNi'r-so STATES rafrsrrr ori ce DEVICE FOR USE IN SHARPEN ING SCREW DRIVERS AND THE LIKE Ernest L. Guy, Pontiac, Mich. j v V Application May 3, 1943, Serial No. 485,438.

5 Claims.

This invention has to do with devices for supporting pointed tools such as screw drivers and the like in proper position with respect to abrasives in order properly to true-up or sharpen the operating end thereof. Screw drivers and the like, especially the fine sizes employed by jewelers, watchmakers and instrument makers, frequently require trueing-up or sharpening. In fine sizes this is a difficult and time consuming operation as heretofore practiced. Devices sometimes used in this operation are complicated and ar expensive. Accordingly one object of this invention is the provision of a greatly simplified and relatively inexpensive device adapted to support tools such as screw drivers and the like while trueingup or sharpening the same by means of an abrasive.

Another object of the invention is the provision of a device for trueing-up or sharpening screw drivers and the like that is characterized by its ease of operation and manipulation.

It is also an object of this invention to provide a device of the class described in which the device can be readily adjusted to handle tools of different sizes.

Still another object of the invention is the provision of a device of the class described which is easily constructed from relatively few parts.

A further object of the invention is the provision of a device of the class described in which the screw driver or other tool is easily adjusted in position with respect to the abrasive stone.

Still another object of the invention is the provision of a simplified device in which both sides of the screw driver or the like may be trued-up without having to readjust the screw driver in the device.

Another object of the invention is the provision of a simplified method of abrading screw drivers and the like to sharpen or true-up the same.

With the foregoing and other objects in view, reference is herewith made to the accompanying drawin illustrating one embodiment of a device or apparatus in accordance with the invention, in which:

Figure 1 is a view illustrating the device with a screw driver or other tool in position therein and showing the manner in which the device is intended to be used.

Figure 2 is an elevational view of the complete device.

Figure 3 is an end view of the device of Figure 2 looking toward the left in Figure 2.

Figure 4 is an elevational view of a portion of the device of Figure 1.

Figure 5 is an end view of the detail. shown in Figurei. v

In the embodiment of the invention illustrated in the drawing, the complete device is indicated generally by the reference numeral ID. The device includes a generally cylindrical bod member l2 having end portions M of smaller diameter than the main portion thereof and acting as axles for disc wheels or rollers l6. Member l2 also has a drilled opening l8 transversely thereof of sufficient diameter to accommodate screw drivers or other tools to be sharpened, of different sizes. The screw driver .is shown as 19 in Figure 1. Lengthwise of the member 12 and at the axis thereof is a tapped hole 29 extending from one end of member 12 to the transverse opening l8 therein. A screw 22 within the tapped hole is provided for securing the screw driver I?) or the like in fixed position in the opening l8.

In constructing the device, two disc wheels or rollers [6 are placed on the end positions Id of the member 12 and secured thereto in any desired manner in such a way as to be able to rotate freely thereon and thus act as wheels or rollers during operation of the device. In the embodiment of the invention shown in the drawing the disc wheels or rollers are secured in position on the axles M by outward radial flow of metal from the end portions of the cylindrical member as indicated at 24 in Figure 2.

In the operation of the device the screw driver [9 or similar tool is placed through the opening l8 and secured in proper position therein by means of the screw 22. The screw engaging end of the screw driver is then placed on the abrasive stone 26. Downward pressure is then applied to the screw driver and the device lflmoved back and forth on the abrasive until the desired amount of metal is removed from the one face of the end of the screw driver. The device with the screw driver mounted therein is then turned over and the operation completed on the other side of the screw driver. This completes the sharpening operation.

The device is simple to construct and is made from relatively few parts of simple construction. The rollers may be simply common washers and the screw 22 may be a standard screw. The device is readily adjusted to accommodate screw drivers of different sizes and to secure the blade of the screw driver or similar tool in the desired position with respect to the abrasive stone 26. Once the screw driver is fixed in proper position by means of screw 22 both sides ofthe blade thereof ma be properly trued up without further adjustment in the device.

The device is particularly advantageous in supporting screw drivers of small sizes such as employed by jewelers and watohmakers, etc. In one form of the device used for this purpose the overall length of same is about seven-eighths of an inch, the diameter of the rollers l6 about five-eighths of an inch, and the opening I8 about three-sixteenths of an inch.

Various changes and modification of the specific embodiment of my invention described herei may be made without departing from the principles of my invention.

I claim:

1. In a device of the class described, a generally cylindrical body member having a transverse opening extending therethrough intermediate the ends thereof and having axle portions at the ends thereof, rollers on said axle portions,

and a longitudinally extending screw extending through the said body member from one end thereof to the transverse opening for securing a tool in proper position to be sharpened.

2. In a device for use in trueing-up the screw engaging end of a screwdriver of small size by means of a fiat abrasive stone on which the device moves back and forth, the combination which includes, a generally cylindrical body member having axle portions at the ends thereof of smaller-diameter than the remainder of the cylindrical body, said cylindrical body member also having an opening intermediate the ends thereof extending transversely of the body mem-- ber for accommodating a screw driver, rollers on said axle portions, and a screw extending from one end of the body member to the transverse opening for engaging the screw driver in the opening and securing the operating end of the screw driver in proper position with respect to the abrasive whereby the operating end of the screw driver may be trued up by rolling the deopening in said body member in proper position vice and screw driver back and forth on the abrasive.

3. In a device of the class described, a generally cylindrical body member having a transverse opening extending therethrough intermediate the ends thereof and having axle portions at the ends thereof, rollers on said axle portions and means for securing a tool in the transverse to be sharpened or trued-up.

4. In a device for use in trueing-up or sharpening the screw engaging end of a screw driver of small size by means of a flat abrasive stone on -which the device is adapted to be moved back and forth, the combination which includes, a body member having axle portions at the ends thereof and having a transverse opening therethrough intermediate the ends of the body member for accommodating a screw driver, rollers on said axle portions, and adjustable means extending from one end of the body memberto the transverse opening for engaging the screw driver in the opening and securing the screw engaging end of the screw driver in proper position with respect to the abrasive whereby the operating end may be trued up by moving the device and screw driver back and forth on the abrasive.

5. In a device for abrading the screw engaging end of a screw driver and the like, a body member having a transverse opening extending therethrough intermediate the ends thereof and having axle portions thereon at the ends thereof, said transverse opening adapted to receive a screw driver to be abraded, rotatable members on said axle portions, and means for securing a screw driver in said opening in proper position to be abraded when the device and screw driver mounted therein are moved back and forth on a fiat abrasive member.

ERNEST L. GUY. 

